| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
If a = c = 9, b = d = 2, what is the area of this rectangle?
| 10 | |
| 18 | |
| 6 | |
| 56 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 9 x 2
a = 18
If angle a = 45° and angle b = 48° what is the length of angle c?
| 52° | |
| 117° | |
| 87° | |
| 97° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 45° - 48° = 87°
Solve for x:
x2 - 6x + 5 = 0
| 1 or 5 | |
| 3 or -9 | |
| -4 or -9 | |
| 8 or 7 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
x2 - 6x + 5 = 0
(x - 1)(x - 5) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (x - 1) or (x - 5) must equal zero:
If (x - 1) = 0, x must equal 1
If (x - 5) = 0, x must equal 5
So the solution is that x = 1 or 5
Which types of triangles will always have at least two sides of equal length?
equilateral and right |
|
equilateral, isosceles and right |
|
isosceles and right |
|
equilateral and isosceles |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
|
vertical, supplementary |
|
acute, obtuse |
|
obtuse, acute |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).